Synergistic effect of expansive agent and steel fiber on interfacial performance and axial compression behavior of UHPC-filled steel tube columns

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2025-02-28 DOI:10.1016/j.conbuildmat.2025.140543

Mohammed A.A.M. Abbas , Xinyi Ran , Adel A. Musleh , Peipeng Li

{"title":"Synergistic effect of expansive agent and steel fiber on interfacial performance and axial compression behavior of UHPC-filled steel tube columns","authors":"Mohammed A.A.M. Abbas , Xinyi Ran , Adel A. Musleh , Peipeng Li","doi":"10.1016/j.conbuildmat.2025.140543","DOIUrl":null,"url":null,"abstract":"<div><div>This research investigates the interfacial bonding performance and axial compression behavior of ultra-high performance concrete (UHPC)-filled steel tube (UHPCFST) columns. The synergistic effect of varying dosages of expansive agent (EA) and steel fibers (SF) on bond strength and bearing capacity were explored through push-out and axial compression tests. The mechanical strength, autogenous shrinkage, microstructure and hydration at UHPC material level were tested, and failure modes, the load-slip, load-displacement and strain curves of UHPCFST were measured. Results indicate that the inclusion of EA and SF significantly reduced shrinkage and enhanced bond strength between UHPC and steel tubes. Specimens with higher EA and SF contents showed improved interfacial bonding, with sustained strength even after initial bond failure. At 15 % EA, shrinkage transitioned into expansion, greatly enhancing bond strength. The combined influence of EA and SF resulted in optimal outcomes when their contents were 15 % and 2 %, respectively. At these levels, the UHPC and UHPCFST short columns exhibited the most significant improvements in shrinkage and bond strength, as well as the compressive strength and ultimate bearing capacity.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"470 ","pages":"Article 140543"},"PeriodicalIF":7.4000,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Construction and Building Materials","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0950061825006919","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}

引用次数: 0

Abstract

This research investigates the interfacial bonding performance and axial compression behavior of ultra-high performance concrete (UHPC)-filled steel tube (UHPCFST) columns. The synergistic effect of varying dosages of expansive agent (EA) and steel fibers (SF) on bond strength and bearing capacity were explored through push-out and axial compression tests. The mechanical strength, autogenous shrinkage, microstructure and hydration at UHPC material level were tested, and failure modes, the load-slip, load-displacement and strain curves of UHPCFST were measured. Results indicate that the inclusion of EA and SF significantly reduced shrinkage and enhanced bond strength between UHPC and steel tubes. Specimens with higher EA and SF contents showed improved interfacial bonding, with sustained strength even after initial bond failure. At 15 % EA, shrinkage transitioned into expansion, greatly enhancing bond strength. The combined influence of EA and SF resulted in optimal outcomes when their contents were 15 % and 2 %, respectively. At these levels, the UHPC and UHPCFST short columns exhibited the most significant improvements in shrinkage and bond strength, as well as the compressive strength and ultimate bearing capacity.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.